Dow Chemical Company (DOW) shows solid improvement this week. The company’s rating rises from a C to a B. Dow Chemical is involved with the manufacture and sale of specialized products and services, such as chemicals, plastic materials, and agricultural products, as well as property and casualty insurance and reinsurance business. For more information, get Portfolio Grader’s complete analysis of DOW stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.